diff --git a/site/src/pages/admin/index.astro b/site/src/pages/admin/index.astro
index 6d5f909..199244a 100644
--- a/site/src/pages/admin/index.astro
+++ b/site/src/pages/admin/index.astro
@@ -3,7 +3,7 @@ import Base from '../../layouts/Base.astro';
 const authUrl = import.meta.env.PUBLIC_AUTH_URL ?? '';
 ---
 <Base title="Admin — BincioActivity">
-  <div class="max-w-3xl mx-auto px-4 py-10">
+  <div class="max-w-3xl mx-auto px-4 py-10" data-auth-url={authUrl}>
     <h1 class="text-2xl font-bold text-white mb-8">Admin</h1>
 
     <!-- Disk overview -->
@@ -113,7 +113,8 @@ const authUrl = import.meta.env.PUBLIC_AUTH_URL ?? '';
   </div>
 </Base>
 
-<script define:vars={{ authUrl }}>
+<script>
+  const authUrl = (document.querySelector<HTMLElement>('.max-w-3xl[data-auth-url]')?.dataset.authUrl) ?? '';
   const overviewEl  = document.getElementById('disk-overview')!;
   const tbodyEl     = document.getElementById('user-list')!;
   const dialog      = document.getElementById('confirm-dialog') as HTMLDialogElement;